     => 1))
 
 "
-this is useful for implementing efficient functions that use datastructures.
+this is useful for implementing efficient functions that use data-structures.
 
 "
 (fact "example 'into'"

(facts
  (fact "String"
    (get "Clojure" 3)
    => \j)
  (fact "Java map"
    (contains? (java.util.HashMap.) "not-there")
    => false)

"
the (:slot data) idiom
"
(fact "querying data aggregates"
  (map :title playlist)
  => '("Elephant" "Helioself" "Stories from the City, Stories from the Sea" "Buildings and Grounds" "Zen Rodeo"))

